Commodore VIC-20 - Page 54

DEVICE#
0
1
2
3
4
5
8
4-127
126-255
DEVICE
keyboard
cassette deck
RS232 device
screen
printer
printer
disk drive
serial bus device
serial bus device—send If after cr
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The command* is specific to each different device. Here are
some of the command numbers:
DEVICE
Cassette
Disk
Keyboard
Screen
Printer
RS232
COMMAND#
0
1
2
1-14
15
1-255
1-255
0
7
EFFECT
read tape file
write tape file
write tape file, put EOT marker at
end
open data channel
open command channel
no effect
no effect
upper case/graphics
upper/lower case
See RS232 (Section 4)
The string at the end is sent to the printer or screen as if a
PRINTS were performed toihat device. With the cassette deck, it is
used for the filename, and with disk it can be a filename or some
control information.
EXAMPLE;
OPEN 1t 0
OPEN 1, 1, 0, ■name"
Read the keyboard
Read from cassette
33
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